Home / 91,904.20-137,856.30-83,739.40

Finding the Fourth Proportional to 91,904.20, 137,856.30 and 83,739.40

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Solution

The fourth proportional to 91,904.20, 137,856.30 and 83,739.40 is: 125,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,904.20 : 137,856.30 = 83,739.40 : x
  2. Step 2: Convert to fraction form
    91,904.20/137,856.30 = 83,739.40/x
  3. Step 3: Cross multiply
    91,904.20x = 137,856.30 × 83,739.40
  4. Step 4: Simplify right side
    91,904.20x = 11,544,003,848.22
  5. Step 5: Solve for x
    x = 11,544,003,848.22/91,904.20
  6. Step 6: Final answer
    x = 125,609.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.